add period templates, add period, edit period, delete period

templates/editPeriod.html

@@ -0,0 +1,29 @@
+{% extends 'base.html' %}
+
+{% block content %}
+<span><h1>{% block title %} Edit Period {% endblock %}</h1></span>
+    <p>
+        <b>Period {{ period.period }}</b>
+    </p>
+
+<form method="post">
+    {{ form.csrf_token }}
+    <p>
+        {{ form.periodTime.label }}
+        {{ form.periodTime(value=period.periodTime) }}
+    </p>
+    <p>
+        {{ form.weekendSchedule.label }}
+        {{ form.weekendSchedule }}
+    </p>
+    <p>
+        <button class="btn btn-primary" type="submit">Submit</button>
+    </p>
+</form>
+<form method="post"
+      action="{{url_for('delete_period',
+                    periodNum=period.period) }}">
+      <input class="btn btn-danger" type="submit" value="Delete Period"
+      onclick="return confirm('Are you sure you want to delete this period?')">
+</form>
+{% endblock %}